Horseshoe-calk



(No Model.) 2 Sheets-Sheet 2.

s. ROBINSON. HORSESHOE GALK.

No. 504,943. Patented Sept. 12, 1893.

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Gum/" un UNITED STATES PATENT Orrrce.

SAMUEL ROBINSON, OF MONMOUTH, ILLINOIS.

HORSESHOE-CALK.

SPECIFICATION forming part of Letters Patent No. 504,943, dated September 12, 1893.

- Application filed December 22,1892. Serial No. 456.000. (1T0 model.)

To all whom it may concern.-

Be it known that I, SAMUEL ROBINSON, a citizen of the United States, and a resident of Monmouth, Warren county, State of Illinois, have invented certain new and useful Improvements in Horseshoe-Oalks; and my preferred manner of carrying out the invention is set forth in the following full, clear, and exact description, terminating with claims particularly specifying the novelty.

This invention relates to horse-shoes, and more especially to the calks thereon; and the objects of the same are to produce an improved calk and to provide improved means for securing a calk detachably to the shoe.

To this end the invention consists primarily in a calk composed of a triangular iron body with a steel facing or covering upon oneside and both ends, together with means for securing it detachably to the shoe; and secondarily in an attaching means consisting essentially of a shank on the calk engaging an opening in the shoe, and incidentally of a locking pin (which may be either a key or screw) to be used in connection wlth the shank-all as described below and illustrated on the accompanying drawings, wherein Figure 1 is a perspective view of the calk alone. Fig. 2 is a similar view of the steel facing of the calk. Fig. 3 is a bottom plan view of a shoe showing three forms of pinopenings. FigAis a plan view of a calk with the screw and key pins in place. Fig. 5 1s a perspective view of a calk with the screw pin slightly removed. The calks shown 1n Flgs. 4. and 5 are capable of application to the shoe shown in Fig. 3. Fig. 6 is aperspective view of a shoe showing two calks in place and one omitted.- Fig. 7 is a section on the line 7-7 of Fig. 6. Fig. 8 is a perspective view of another form of calk with the screw shank and its key pinslightly removed. This view also shows in dotted lines how ascrew pin may be used with this calk. Fig. 9 is a perspective view of one form of shoe showing one calk omitted, one in place, and a third in place and in section. Fig. 10 is a perspective Vii-KW of one of the calks used in Fig. 9. Fig. 11 1s a perspective view of another form of calk which may be used in Fig. 9 with slight changes in the construction there shown.

In all the figures of the drawings where they occur, the letter H designates the horse-shoe, R a recess therein, 0 the calk, E its enlargement, S the shank, and P the fastening pins, which may be screws as indicated by small letters or keys as indicated by large letters.

The caZ7e.-The construction of the calk is preferably as follows (see Figs. 1 and 2): The body 0 of the calk is of comparatively soft iron, triangular in end elevation and rectangular in all sections at right angles to its axis; that is to say, the upper face or top and the two sides of the calk are rectangular, while the ends are triangular, thereby forming an approximately flat side for the calk against the shoe and a narrow working edge which strikes the earth. Secured in any suitable manner to one face and to both ends of the body 0 is a covering or coating 0 of steel fully illustrated in Fig. 2. It will be obvious that the softer body will wear away in use more rapidly than the harder facing, and as the latter stands on edge and with the points of the triangular ends 0" downward, the wearing away of the softer body will keep the calk constantly sharp. However, in summer the calk could be filed off to present a flat lower face, as on the dotted line in Fig. 1; or

the whole calk could be filed off, having only the shank S to fill the shank-opening.

The fastening pins-In the lower face of the horseshoe, at proper points I make openings h for the shanks S of the calks, whichopenings are preferably of good size and threaded, the shanks S being preferably also threaded to correspoud,-whereby the shank of the calk may be screwed into the shankopening. After so seating it, means must be provided to prevent its unscrewing and hence I have devised the fastening pins. These pins may be screws as shown at p, and which pass across grooves g in the top of the calk (Fig. 4.) and corresponding grooves g in the shoe (Fig. 3); or, as in Fig. 6, the screw 19 may pass upward in grooves g in the meeting faces of the calk and shoe through the groove and through a hole as shown at 9 but it will be clear the screw 19 may pass directly through a hole k in the calk (Figs. 5 and 11) and into a hole It in the shoe. After being inserted the screw is turned tightly home and its dismodification.

the top of the calk as shown in Fig. 4 and in the same manner as does the screw 0 therein; but which key P will preferably pass into registering grooves G between the meeting faces of the end of the calk and the shoe (Figs. 6 and 7), thence upward through an inclined hole G2 in the shoe, and at the toe through a portion of the hoof, and be clinched thereon as shown at G thereby securing the calk oblique to the length of the shank, and I consider such arrangement highly advantageous. It the shank should be plainthat is without threads-an oblique fastening pin would tend to prevent to a certain degree the dislocation of the shank from the shank-opening; and

whether the shank is smooth or threaded, it

will be obvious that the pin will prevent the rotation'of the shank in its opening. A vertical pin would not prevent the shank being drawn out of its opening, and a horizontal pin would not afford so stronga resistance to the rotation of the shank: hence I claim for an oblique pin the combined advantages arising from either of the other constructions. The two forms'of fastening pin may be used independently or simultaneously as shown in variousviews, as desired.

Thes'hanlc.-As has been above stated, the shank S is usually practically a screw cast or forinedintegral with the calk as shown at s in 'Fig. 5, though this is susceptible of some For instance, in Fig. 8 I have formed an opening 0 through the body of the calk with its lower end enlarged as at 0, and I make the shank s in the shape of a screw with an angular head 8 of a size to pass into the enlarged lower end 0 of the opening 0 and to rotate therein. A calk of this construction preferably has points or teeth T on its upper face to embed the shoe or to pass into teeth openings 25 therein as shown in several views. The calk is brought into position and the screw 3 passed through the opening 0 and into the shank opening it and after the screw is turned home a fastening key P is brought into use to prevent the screw from working loose. This key is passed through an inclined opening 9 in the calk, and preferably through the shoe and clinched as shown in Fig. -7, and the head of the key stands against one of the fiat faces of the head 82 of the'screw-shaped shank 3.

A second modification is shown in Figs. 9, 10-"and 1]. In this case the shank s is rectangular and fits into a similarly'shaped hole H in the shoe H, said hole being formed in a slightly thickened part H of the shoe.

. Transversely through the shank s is formed Fig. 11 wherein the square shank s is pro- (A vided with grooves g for the reception of either style of pin shown in Fig. 4:, and in this case the enlargements I'I of the shoe must of course be provided with suitable openings for these pins.

The recessed shoe -In Figs. 6,and 7 I have shown a shoe provided in its lower face with recesses R, and the calk O is enlarged at its upper end as at E so as to accurately fit said recesses. T-he'ends of the latter and the ends of the cal-k are rounded or curved as ateconcentric with the shank and shank-opening; and the pin-openings are preferably constructed in the shape of grooves g in theends e and adapted to be caused to register, above which the openings are continued'throughthe' shoe as at G This form of calk is obviously applied by screwing this shank into the shank-opening and thereafter one or more fastening pins are inserted to prevent unscrewing. The shank of the toe-calk stand-sas shown at G in Fig. 7 or maybe clinched in asmall notch Q in the top of the shoe as shown in Fig. 6. The shank of the heelcalk O (Fig. '6) will be nearer the fiat rear end of the calk than its front rounded end'e, so'that this heel calk can be turned to its seat in'the recess R; after which the same fastening pin P is used as has been described, but here this pin cannot be clinched'through the hoof as shown in Fig. 7 but will preferably rest in the notch Q.

It is thought that the manner of attaching and detaching the various calks described and shown, and of inserting and removing the fastening pins will be clearly understood by a person familiar with the art. The essential part of the invention is that the 'calk has a shank fitted into a shank opening in the shoe=-preferably screwing thereinto, 'although it may pass intosuch openings-and be held by a'transverse screw; and theunscrewing or dislocation of the shank from these openings is prevented by'means of one or more fastening pins, themselves either screws or keys. All else is but a description of the different ways of carrying out this idea. As stated above, the body ofthe calk is preferably of iron faced with steel, although this may be modified. Manyother changes in the exact details of construction may-also be made without departing from the spirit of my invention.

What is claimed as new is 1. A horse-shoe calk comprising an iron body having rectangular top and sides and triangular ends, a steel coating on one side and both ends, a shank rising from said body, and means for connecting the shank detachably with the shoe, substantially as described.

2. The combination with a horse-shoe having a calk-opening and a smooth pin-opening extending obliquely upward through and terminating near the outer edge of the shoe; of a calk having a threaded shank fitting said calk-opening, and a pin opening adapted to be brought in register with that in the shoe, and a fastening key passing through said registering smooth openings, and clinched at its upper end, substantially as described,

3. The combination with a horse-shoe having a calla-opening, a threaded pin-opening, and a smooth pin-opening extending obliquely upward through and terminating near the outer edge of the shoe; of a calk having a threaded shank fitting said calk-opening, and pin openings adapted to be brought in register with those in the shoe, a fastening screw removably seated in the registering threaded pin-openings, and a fastening key passing through said registering smooth openings, through and out of the hoof, and clinched on the latter, substantially as described.

4:. The combination with a horse-shoe, having a recess in its lower face, a threaded calkopening in the shoe at the center of the recess,

the ends of the latter being curved concentric to said opening, and a pin-opening passing through the shoe and forming a groove in one of said curved ends; of a calk, its body shaped to fit said opening and having a sharpened lower edge extending below the plane of the shoe, and a threaded shank taking into said shank-opening, the end of said body having a groove adapted to register with that in the recess, and a fastening pin passing through said registering grooves into the pin-openin g, as and for the purpose set forth.

5. The combination with a horse-shoe having a notch in its upper face and a recess in its lower face, a threaded calk-opening in the shoe within the recess, one end of the latter being curved concentric to said opening, and

a pin-opening passing through the shoe to said notch and forming a groove in said curved end: of a calk, its body shaped to fit said opening, a threaded shank taking into said shank-opening, the end of said body having a groove adapted to register with that in the recess, and a fastening pin passing through said registering grooves into the pin-opening and clinched within said notch, as and for the purpose set forth.

In testimony whereof I have hereunto subscribed my signature on this the 17th day of December, A. D. 1892.

SAMUEL ROBINSON.

Witnesses:

C. B. PEAsn, B. Gr. KIMNOEL. 

